Miner&#39;s drill.



c. F. L INDEN MUTH & B. A. HANLEY.

. MINERS DRILL. I

I APPUCATIGN FILED SEN I 1, 1915: 4 y

1,17 ,402, Patented Apr. 4,1916.

' W'Hvwowo $3 U1 ED OFFIC CHARLES E. LmnENMUTH AND RAYIllIOND A. HANLEY, on 1111181338, IPENNSYLVANIIIA.

MINERS' Dares.

To all whom it may concern:

Be it known that we, CHARLES F. Lin- DENMUTH and RAYMOND A. 'HANLEY, citizens of'.- the United States. residing at Aristes, in the county of Columbia and State of Pennsylvania, have invented new and useful Improvements in Miners Drills, of which t-he'following is a specification.

The invention relates to drills, and, more particularly to the class of detachable bit rills forminingpurposes.v

The primary object of the invention is the provision of a drill of this character wherein the bits are detachably mounted so that either two, threeor five bits can be" used, as the occasion'may require.

Another object of the. invention is the provision of a drill of this character where- 'in the bits and the chuckof the drill are of novel form for the mounting of the said bits in the chuck and the fastening of the same. a

A further object of the invention is the provision of a drill of this character which is simple in. construction, thoroughly reliable and efficient and inexpensive in'manufacture.

With these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter fully described, illustrated in Fig. 3 is a fragmentary 5 1s-a sectional view on the line 55 of,

of the shank 10 is .xhaving therein the.

the accompanying drawing, and in the claim hereunto appended.

In the drawing :Figure 1 is a side elevation of a drill constructed. in accordance with the invention. Fig. to Fig. 1, lookingat right angles thereto. vertical longitudinal sectional view through the drill. Fig. 4 is a perspective view of one of the bits. Fig.

Fig. 1.

Similar reference'characters indicate corresponding parts throughout the several views in the drawing. f

Referring to the drawings in detail, the drill comprises a solid shank 1Q having formed at one end external threads 11 for the v detachable fastening thereon of a tubular handle 12, while at the opposite end formed the chuck 13 shaped slots 1 1 and 1n-the .chuck 13 I registering grooves 24, while formed in in operation, strong, durable? pointed out 2 is a view similar ends correspandingly will be disposed at other, a medial wing formed on the outer end substantially. key-hole of the shorter blade and having an outer cut- I 15, respectively, which,

' Specification Qfietters ten Patented Apr. 4, 1916. Application filed September 11, 1915. Serial N 0. 50,241. i I

ently described. Detachablyfitted in the chuck 13 are the bits 17 and 18, respectively, each being formed with an enlarged inner end 19 correspondingly shaped to the slot f for receiving the same,' and formed in the chuck. The bit 18 is provided with a central bifurcation 20 which is correspondingly The bit 17 is formed with a medial cutting wing 21 and outer-cutting prongs:22,-while the blade 18 is, formed with, the cutting prongs 23 similar to the prongs 22. "Formed and in the blade 18 are the bit 17 is an opening 25 adapted to aline with the grooves 24', and through these grooves 24 and pin 26 which has engaged in the groove 16, and this-cotter pin serves to securely fasten the. bits 17 and 1 8 in the chuck, tached so that'either one or ,both of the bits can be used.

Fromjthe foregoing description, taken] in. accompanying. drawing,

connection with the the construction and manner of operation of the device .will be clearly-understood; and

therefore a more extended explanation has been omitted.

.What is claimed is z i A drill of the class described cdinprising yet they can be readily de-" p shaped to the cross section of the blade 17 y for receii ingthe latter when the bit. 18 is inserted 'in-thechuck.

opening .25 is passed a cotter i the bent outer end '27- a shank having substantially keyhole shaped,

slotsinone end thereof at right angles to each other, one 6f the slots being difg'greater I length than thofother for 4 I communication with eachothtrq bits having enlarged inner shaped to the inner ends of the slbts-ifor detachable engagement therein, one, of fthe bits being of greater length than the'othei, said longer bit being bifurcated. medially thereof for the intersection of the other'bit, whereby the same right angles'to each ting edge, outer prongsv formedat opposite 011 said hm'fer' bladfi av M1 in said channels for locking fhe blade in :wvelmflunthingflfis, 013w thslot; mm the lmng'm blade and In testimony whareof we affix our sig- 1:! m1 w bavclml mutting edges said natures. a y h 5. End the wkflinf the slot Ie;

CHARLES F. LINDENMUTH.

mm being 'imrl'ned with registerml :1 pm engaged wpwtivelv, RAYMOND HANLE'Y. 

